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A157221 as a simple table

na(n)
01
11
21
31
44
51
61
711
811
91
101
1126
1214608
1326
141
151
1657
17152637
18152637
1957
201
211
22120
231479726
24251732291184
251479726
26120
271
281
29247
3013824739
3116871482830550
3216871482830550
3313824739
34247
351
361
37502
38126781020
391103881308184906
40113909683214485984529600
411103881308184906
42126781020
43502
441

[1,1,1,1,4,1,1,11,11,1,1,26,14608,26,1,1,57,
 152637,152637,57,1,1,120,1479726,251732291184,
 1479726,120,1,1,247,13824739,16871482830550,
 16871482830550,13824739,247,1,1,502,126781020,
 1103881308184906,113909683214485984529600,
 1103881308184906,126781020,502,1]